Manufactured from high strength copper alloy with stainless steel screw. UL 467 Listed and CSA certified for grounding and bonding and direct burial. GBL-4DBT and GBL-4DBTH are UL2703 Listed. Lay-in feature for ease in installation. For copper conductor only. Green color aids in visual inspection. T-Tin Plated. H-Stainless Steel Hex Head Screw. Stainless mounting hardware kits available.